Fishing-tool and support



D. L. DRISCOLL.

FISHING TOOL AND SUPPORT.

APPLICATION FILED MAY22,1920- Patented Mar. 8, 1921.

[NVENTOR Q y N B I! \m, w a H T6 w y I w a WITNESS A TTOR NE YS UNITED STATES PATENT OFFICE.

DENNIS L. DBISGOLL, or COALINGA, CALIFORNIA, AssIeNon or ONE-HALF 'ro BUN'I'ING IRON woaxs, or sitN rnANcIsco, CALIFORNIA, a conroRA'rIo or CALIFORNIA.

FISHING-TOOL AND SUPPORT.

Specification of tetters Patent.

Patented Mar. 8 1921.

Application filed Kay .22, 1920. Serial No. 383,463. v

To all whom it may concern:

Be it known that I, DENNIS L. DRIBGOIL, a citizen of the United States, residing at Coalinga, in .the county of Fresno and State of California, have invented certain new and useful Improvements in Fishing-Tools and Supports, of which the following is a speclfication.

The present invention relates to that type of implement commonly known to well drillers as a fishing tool, and the invention has for its principal object to provide a type of tool particularly adapted for the recove of shouldered or collared implements, suc as a strin of pipe or tubing from a well. further 0 ject is to provide a simple form of mounting or support for my present invention whereby the same may be readily and rapidly positioned in the support for lowering into a well for the recovery of the lost implements without loss of time, and one which is adapted to receive a plurality oftools constructed different from the present invention, but for the same pur ose.

To comprehend the invention, re erence is directed to the accompanying drawing, wherein Figure 1 is a vertical sectional view of the preferred embodiment of my invention, disclosing the holder and tool.

Fig. 2 is a transverse sectlon'al view taken .on line 2-2 of Fig. 1, viewed in the direction of thearrows.

In the drawings, referring particularly to Fig. 1 the numeral 1 indicates a tubular. steel shell preferably interiorlythreaded at its up er and lower ends as at 2 and 3. The shell 1 at its'lower end, immediately above the threads 3, is provided with an annular inwardly projecting shoulder 4 having an inwardly beveled upwardly inclined guiding face 5 and a relatively flat trap ring supporting shoulder 6, the face ofwhich is' preferabl disposed at right angles to the body of t e shell 1, and said face IS'diSPOSBd a distance below the upper threaded end 2 of said shel, as in Fig. 1 of the drawings. '3

Removably positioned within the upper open end of the shell 1, prior to the threading of the ipe 7 to the. thread 2.for lowering the shel into .the well, is a trap ring 8 of the diameter slightly less than the interior" diameter of the shell 1. The trap .per edge of which edge 20.

ring 8 is provided with a relatively flat edge 9 adjacent to its lower-peripheral edge for resting on the trap ring supporting shoulder 6, and the inner surface of said ring is up- .wardly a'nd inwardly beveled as at 10, said bevel being preferably at substantially the same inclination as that of the bevel 5 to insure the guiding of the member overwhiclt the tool is lowered through the opening in& the center of the ring 8. 1

The upper surface of-the ring 8 carries an,

upstanding boss 11 the opposite faces of,

which lie in spaced relation to the inner and outer wall surfaces of the ring, providing a A liner seat 12 at the outer side of the boss and a trap dog seat13 at the inner side. The boss 11 is vertically slotted for its full depth at .a plurality of points as at 14, and in its outer face is formed with an annular ring receiving groove 15 in which is adapted to be received or sprung a split ring 16., The ring 16 mounts a plurality of trap dogs 17, illustrated as four in number, which are arcua'te in plan, and disposed to lie adjacent the inner surfaces of the boss 11 with their lower surfaces resting on the seat 13.

From the rear of each trap, dog-17 extends a tongue 18, oneof'said tongues extending through each of the slots 14, and their terminal ends'are each provided with an opening throu h which the ring 16 extends. The trapdogs 17 when 'mounted, as in the drawings, provide a substantial circular opening overlying the seat 13, and of a diameter smaller than the opening in said ring 8. The engaging surfaces of said trap dogs 17 are provided with cam faces19, the upterminates in a biting To retain the trap ring 8 on' its seat and preclude vertical movement of the same within the shell 1, and to permit the use of trap rings or other. members of various heights, a suitable tubular liner 21 is positioned within the shell 1, and the same is adapted to rest at its lower edge on the liner seat-12 of the ring 8, and at its upper I I edge the same is engaged by the lower edge of t e pipe or member threaded into the upper end of the shell 1.

The removability of the trap ring 8' with its associated dog 17 as a unit from the shell 1, enables other tools or members to be positioned, within the shell, gust so long as the auxiliary members are 0 a diameter to rest on the shoulder 6, and the provision of a removable liner 21 intermediate the lower end of the pipe 7 and thevshoulder 6 enables the employmnet of trap rings or other bases of various heights.

By my improved construction it Will be apparent that the trap dogs will upwardly pivot and slide freely over the walls of any member of a diameter capable of reception within the central opening of the trap ring, on the lowering of the device thereover, and said trap dogs will-"serve as cam members and engage the wall of the member received therebetween on the upward movement of the device. If such received-'device is of a diameter smallerrthan that o'fthe opening formed by the trap dogs when the same are in theirhorizontal position, and is provided with a flange or collar of a diameter greater than the diameter of the opening formed by said trap dogs in said position, said dogs will, on the rising of the shoulder above the same, drop by gravity and provide a support on which the shoulder or collar will rest during the removal of the engagedmember from the well.

Having thus described my invention,.what I claim as new and desire to protect by Letters Patent is: y

1. A fishing tool for the described pur' pose, the same comprising a tubular support,

a tubular shell carried thereby and formed on its interior with a supporting shoulder, a'trap ring within said shell and resting on said shoulder, and a plurality of upwardly swinging trap dogs pivotally mounted on said ring with their free edges overlying the central openinof said ring.

2. A fishing tool for the described purpose, the same comprising a tubular support, a tubular shell carried thereby and formed on its interior with a supporting shoulder, a trap ring within said shell and resting'on said shoulder and a. plurality of trap dogs carried by said trap ring and mounted to swing on a horizontal fulcrum said dogs being free to swing upwardly and precluded rom movement below a substantially horizontal position by contact with said trap r1n 3A fishing tool for the described purpose, the same comprising a tubular support, a tubular shell carried thereby, and a member removably positioned within said shell for engaging a member received within said shell, the same comprising a trap ring or base and a plurality of independent enmaintaining the same on'its support.

5. A fishing tool for the described purpose, the samecomprising a trap ring, an

interiorly shouldered "shell within which said trap ring is received and supported,

:said ring being formed on its upper surface intermediate its opposite sides with an annular boss formed on its outer surface with an annular groove and provided at intervals with openings therethrough, a pluralityof trap vdogs formed with arcuate faces overlying the'opening of the ring and each provided with an apertured ear eX- tending through the openings in said boss with their under-face resting on the body of sald ring adjacent to the inner wall of said boss, and a split ring positioned through sald ear openings and receivable in said boss groove for retainingthe trap dogs in position, and a tubular'support to which said shell is detachably secured.

6. A fishing tool for the described purpose, the same comprising a trap ring, a plurallty of pivotally mounted trap dogs carried thereby and overlying the opening therein, said dogs when in their normal posltion providing an opening of a diameter smaller than that of the interior of said ring, an ln-teriorly shouldered shell within which said ring 15 removably mounted and guiding surfaces onthe interior. of said shell and ring for guidlng the object over which said tool is lowered toward the opening formed by saiddogs, and a support to which said shell is secured.

7. A fishing tool for the described purpose, the same comprising a tubular body, a plurality of engaging members carried thereby and when in their'no'rmal' position providing an opening inline with and of a diameter Smaller than the interior opening of said tubular body, a tubular shell within WhlCll said body is removably mounted. and a support to which said tubular shell is detachably secured.

In testimony whereof I have signed my name to this specification.

DENNIS L. DRISCOLL. 

